CISC-L2-000170 - The Cisco switch must have IGMP or MLD Snooping configured on all VLANs

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IGMP and MLD snooping provide a way to constrain multicast traffic at Layer 2. By monitoring the IGMP or MLD membership reports sent by hosts within a VLAN, the snooping application can set up Layer 2 multicast forwarding tables to deliver specific multicast traffic only to interfaces connected to hosts interested in receiving the traffic, thereby significantly reducing the volume of multicast traffic that would otherwise flood the VLAN.


Globally configure IGMP or MLD snooping for IPv4 and IPv6 multicast traffic respectively:

SW1(config)#ip igmp snooping

See Also

Item Details

References: CAT|III, CCI|CCI-000366, Rule-ID|SV-220637r539671_rule, STIG-ID|CISC-L2-000170, STIG-Legacy|SV-110245, STIG-Legacy|V-101141, Vuln-ID|V-220637

Plugin: Cisco

Control ID: 20654d2810aee77efc3e4584449461ff1d1422b869b33aa13e552dfe53e208bf